The possibility of peace talks between the two sides whether the demands of various aspects can be met.
A. depends on
B. is depending on
C. is depended on
D. depended on
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(答案→)A. depends on
B. is depending on
C. is depended on
D. depended on
解析： 考查动词短语的时态。depend on无被动，无进行时态，排除B,C；根据can be met，可知要用一般现在时态。选A。